Pd-only three-way catalyst(TWC),Pd supported on washcoating(the mixture of alumina and Ce-Zr solid solution)/cordierite,was prepared and its catalytic performance and the operation window(λ-value)at 450°C were evaluated with the simulated automotive exhaust feed gas.Surfactants such as Tween-80 and Span-20 were added in the process of preparing the catalyst in order to improve the thermal stability and catalytic performance of Pd-only TWC.The fresh and aged catalysts at 1000°C for4 h were characterized by low-temperature N2 adsorption,XRD,XPS,and H2-TPR techniques.The results show that the presence of surfactants in the synthesis slurry could influence the physicochemical properties of the final Pd-only TWC.The FTS catalyst prepared with the mixed surfactant of Tween-80 and Span-20 exhibited excellent three-way catalytic performance.After being aged at 1000°C for 4 h,the catalytic performances of Pd-only TWCs slightly decreased,but the FTS catalyst still demonstrated higher catalytic performance and better thermal stability compared with the Pd-only catalysts prepared with single surfactant or without any surfactant.And the FTS catalyst has a widerλvalue(operation window)than other catalysts,even after being aged at 1000°C. Pd-only three-way catalyst (TWC), Pd supported on washcoating (the mixture of alumina and Ce-Zr solid solution) / cordierite, was prepared and its catalytic performance and the operation window (λ-value) at 450 ° C were evaluated with the simulated automotive exhaust feed gas. Surfactants such as Tween-80 and Span-20 were added in the process of preparing the catalyst in order to improve the thermal stability and catalytic performance of Pd-only TWC. fresh and aged catalysts at 1000 ° C for 4 h were characterized by low-temperature N2 adsorption, XRD, XPS, and H2-TPR techniques. The results show that the presence of surfactants in the synthesis slurry could influence the physicochemical properties of the final Pd-only TWC. FTS catalyst prepared with the mixed surfactant of Tween-80 and Span-20 loaded excellent three-way catalytic performance. After last aged at 1000 ° C for 4 h, the catalytic performances of Pd-only TWCs slightly decreased, but the FTS catalyst still of higher catalyt ic performance and better thermal stability compared with the Pd-only catalysts prepared with single surfactant or without any surfactant. And the FTS catalyst has a greater λvalue (operation window) than other catalysts, even after being aged at 1000 ° C.